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CHARLES W. WAILE'Y, oE NEW OELEANs. LoulsrANA, AssrcfNoR To NEW vORLEANSPNEUMATIo rNorELLINe COMPANY.

Letters Patent No. 98,7 24, dated canary 11, 1870.

CUT-OFF VALVE-GEAR. L

The Schedule referred to in these Letters Patent and making part of thesame.

Nature and Objects of the Invention.

My invention consists of certain mechanical parts, peculiarlyconstructed and arranged, or combined together, with the object ofregulating the cut-01T of the motor, whethercompressed air or steam,after it enters the cylinder, in such manner that the operator of theengine. may, at his pleasure, or whenever circumstances may-require'it,in an instant of time, change the cut-olffrom the point at which theexpaib siveenerg'y of the motor, (compressed air, or steam, as 'the casemay be,) constitutes nearly the whole force exerted to operate theengine,.to any other point, very nearly down to 'the end of the strokeof the piston, andthus be vable to apply 'the positive force of themotor inadd-ition to its expansive power, during the whole stroke,l orat any point short of the li'ull stroke, accordingly as the requirementso f the 'occasion may render the development and application of thewhole powerA o t' the engine, or of any proportion of the samelesstlranl ther.whole, expedielglt or necessary.

My' invention Vis designed -for 'use in,` connection, especially withmypneu'matic'engine for the propulsionof street-railroad a-rs, and tooperate the toggle-y valvcs secured to me by my said patent of the lth.

September, 186S,-`but it may obviously beemployed,y

without essential,modification of any.. of its parts,

croi" its general principles of operation, to many existing Well-knownvalves, and I reservethe right, accordingly, of applying'it to theoperation of any other valve, it' I shall think proper to do so.

The' drawing presentsa side elevation of my inlveution, in 4connectionwith a pneumatic cylinder, which we may suppose to be on a street-car,for the propulsion oflt-he same. i

My invention will be; .better and more quickly derstoodV by reierringtothe drawing.

ce is the driving or crank-shaft, on which is placed the mitre orbevel-cog wheel, l), on the back or .rear face of which ispermanentlysecured a wide, fiat bar, e, which, at oneoi" itsextremities, is bent sowas to project at right angles, as shown atc',from the plane of` thebar lc proper', and then again downwardly, as

shown' 'at c", sutlicientlyto allow the double-incline block `jto hefixed transversely to it, as shown. At 4theoth'er extremity ot' the bare, a similar incline block, t', is fixed, with its point or apexpointing in precise oppositionto that of bloc-k j.

The bar lc' and mitre-wheel b are mounted on ya will bringit in Contactwith the sleeve, c', which, fitting loosely ou shaft a, permits then'rtorotate easily on said shaft, .whilst a collar, d, that is immovahlyfixed in its place, in connection with the mitre-u-'heel e on the lowerend ot' shaft H, prevents. said` wheel and bar from. having anylongitudinal traverse motion, on said shaft (4,.. beyond 4 what lisrequisite to thel easy working of the two mitre-wheels together. v

To further secure vthis end, I may-'fix on shaft c, acollar, similar to(l, at the opposite'end of sleeve a.

"lhe mitre-wheel e, on vthe end of shaft H, is held in thcvariouspositions which determine the point of the cnt-ntl, through theagency ofother parts, to be presentlydescribed, by the crank g, which issupported on an arc, f, on..` which it rests, and is retainedyinany'position that may be required, by means ofV -snitable notches. inthe upper edge of said arc, as sho-wn.

On the main driving-shaft a is placed a disk-wheel,

'1, having. a diameter which will bring its periphery very near thesection c" of the arni orbar o.

This wheel l is provided with a long, openhub or bearing, on, thatterminates in a collar, m', which has a notch in it to receive afeather-key, 21,-'to corn- .pel its rotation with the shaft a, but yetat the same time to permit it to'have a reciprocatinglongitudinaltrzwerse-motionon the shaft c. t

This wheel Zfcarries a friction-roller, l', near its peripher f, whichis placed onv its axis in such Vmanner as to rotate at right angles, orperpendicularly, to the plane of thesaid wheehand at that poi-ut'whichdouble inclinefplane blocks j and Y.

The roller I', in the practical operation of the .ma-

chine, impinging against said angular blocks ,j and yi, becomes themeans, in connection with said blocks, ot"

actuating other parts, which, being directly connected with'thecnt-oivaires, give motion to the same, so as to cut on" the lnotorai'tcrentering the cylinder', atagreater or lesser' distance from the portsoi' induction, accordingly as a greateil or lesser measure otthe-positive force of the same is requisite to fuliil the requirementsot` the time and occasion, under the changing conditions to which theengine is subjected, what ever the special duty it is intended toperform; for we have seen that the wheel l is prevented' from revolvingon the shaft a, by a feather-key, and that1 therefore, thcrollcr Z'mustnecessarily have a iixed posiA tion in relation to the craukA, on theend of that shaft, whatever that relative position maybe.

The best relation is to have the roller so placed that it `will occupyan exactly vertical position over .the centre ot' shai't (1., whenthecrank A is at its lower dead-point, as shown by the drawings,because,

under this arrangement, any accidental dislocation or displacement ofthe parts will be more quickly discernible and rectified; but anyrelation will answer, provided only, it secures the shortest cutoii`,when the crank q -occupies one or the other ot' the terminating notches,in the traverse,- aro supporting-.K

lower endlof the bar I), which leads to and operates.

thecut-off, which I need not describe, since the same is fully describedin my patent of September 15, 1868, to which I have already referred.

I now proceed to describe the action or operation of my invention, withreference to the valves dcscribed in said patent, although, as I havebefore remarked, it is equa-ily useful, and may be just as easilyapplied to other cut-oit" valves.

Referring to the drawing, we will suppose the p osi- -tion of the part-sin an engine in actual use toA be the same' thereupon represented, thecrank being at the dead-point of the downward stroke.

The. crank g of the cut-ofi' is in the notch marked 1, and the lowerinduction-valvcon the right-hand side of the cylinder O, open. I

Now,y as the crank moves forward, the angular bloekj, on the bar c,comesin contact with the roller l', and forces the diskavheel l to theleft, and,\with it, the pendent section of the rock-armo. This'clevatesthe horizontal section of said arm, and with it the rod I, and thuscloses the valve c, before the piston has accomplished more than a fewinches of its stroke, and, hence', leaves the expansive force lof thelcompressed air, gas, or steam to finish the stroke.

By changing t-he crank y from notch vl tothe last notch iny the otherextremity of the supporting-arc f, the bar c is rotated suiiiciently toIcarry the part'j around, to a point which will prevent the roller l', inconsequenceof the relation of thc sameto crank A, from :coming incontact with it, and thus, through the intermediatemechanism, closingthe cut-ott valve. until tbe .piston ofthe cylinder has accomplishednearly the w-boleof its stroke; so that-the positivel force of themotoris added to its expansive power, to drive the piston to that extent,which, obviously, will developa far greater power in the engine thanwould be the case it' the expansive energy of the motor were chieflydepended on to operate it.

To reduce the measure of the posit-ive or direct force of the motor,that is applied to any point 4of the stroke less than very nearly thewhole of it, it is only necessary to move and fix the crank g in thatintermediate notch between the two .outside notches in thesupporting-arc f, which will cause the valve to close when thepiston-head or follower -ha's reached the desired point inthe cylinder.Hence, it willgbe` perceived, my invention puts the control of thecutoff completely in the power of the engineer, and cnmake the cut-offat any point in the stroke of the piston which he pleases, and thus toeconomize the power of the engine to the lowest possible limit.-

.when employed as a motive-power, to that extent that the wholepi-iwerthatis contained in either, when is utilized andmade' available in'.practice.

` I am aware that several inventions have been made and patented, whichpropose to develop or bring into use the complete expansive power .ofsteam, .but they throttlelvalve, and there is no existing mechanicalarrangen'ient, so far my knowledge extends, that. does develop thisprinciple in point of fact, fully and completely.

To illustrate the value of my invention, I will suppose that I have inthe boiler,ftank, or reservoir, a pressure to the square inch of threehundred pounds, and that to run my engine, I need only ten pounds tothesquare inch on the piston.

Non', to husband this excess of power, by letting oulyjust4 enough ofthemotor into `the cylinder to exert a pressure of ten pounds on theVpiston by its expansive energy, to the end of its'st-roke, is what Iaccomplish hy my invention, in connection with my toggle-valves, whichopen instantlyto their widest extent, and hence admit the motor with itsfull force to start the piston on its stroke.

of a yoke, E, and'cam-rod'l", opens the valvesv and w inthe usualmanner, whilst an arm, G', that is secured on the outer end ofthepiston-rod, by means of a rod, G', operates the eduction ordischarge-valves e'w'.

I claim, as my'iuvention- 1. The mitre-wheel b, and tiat bar c, incombination withthe disk-wheel andv its 'friction-roller l', whenthese-parts are constructed and arranged on the shaft c with respect toeach other, and operate as described, for the purpose sctforth.

2. lhe above combination, in combination with tlie rock-arm o and rod P,as described, for the purpose set forth.

3 The shaft n, 4mitre-wheel b, armc, with its -double` incline-pianebiocksand i., disk-wheel Z, rockarm o, and rod Ig, in combination withthe mitrewheel'c, verticalrod H, crank g, and supporting-arc j,'whenthese parts are constructed,relatively an -ranged,"and'A operate asdescribed,for the purpose set forth.

4. The-'above combinatiom'in combination with the eccentric I), yoke E,a-nd cam-rod F, as described, for the purpose set forth. A

5. -The con'ibinatipn audarrangement of the parts embraced intheforegoing claims, in combii'lation with the c'ut-offvalves of a steamor pnetnnatic cylinder," as herein described, for the purpose-setftbrth;

' C. NV. IVAIL'EY.

Vitnesses: l

'RUFUs R. RHODES, FnANKLI'N ROBERTS.

ables him, by a mere movement of the crank g, to'

The further advantage results correlatively frommy invention, that itbrings` into'development andj; exercises the expansive principle in air,gas, or steam,y

at higher pressure than is needed to drive the engine,-

are all, when analyzed, mere modifications of the.

Aneccentric, I), on the driving-shaft a, by means

